Abstract
Municipal solid waste incinerator (MSWI) fly ash contains large amounts of arsenic and antimony. This study focuses on the incorporation and evaporation of arsenic and antimony when MSWI fly ash added to clinker raw meal. Thermal analysis was used to simulate the “single incorporation” of arsenic and antimony into clinker with HSC. Statistical analysis was acquired by cement industrial monitoring data to determine the effect of total chloride, arsenic and antimony input on the incorporation or evaporation of arsenic or antimony. A simplified mass balance model was used to evaluate the effect of cement kiln dust (CKD) recirculation on the “multiple incorporation” of arsenic and antimony in clinker and the evaporation of arsenic and antimony in waste CKD. The results indicated that arsenic and antimony was largely incorporated into the clinker as Ca2(AsO4)2(s), even in the presence of chlorides. Moreover, CKD recirculation promoted arsenic and antimony incorporation into clinker.
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Abbreviations
- m:
-
Mass
- rm:
-
Recirculation ratio of cement kiln dust
- ME:
-
Mass of arsenic
- R:
-
Mass ratio of As in cement kiln dust to total arsenic
- RC:
-
Recirculation ratio of arsenic in cement kiln dust
- mswifa:
-
MSWI fly ash
- coa:
-
Coal
- raw:
-
Cement raw meal
- ckd:
-
Cement kiln dust
- ckdw:
-
Waste cement kiln dust
- ckdr:
-
Cement kiln dust recirculation
- clk:
-
Clinker
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Acknowledgements
We acknowledge the financial support from the National Science Foundation (No. 51108276) and the National Basic Research Program of China (No. 2011CB201500) in China.
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Wang, L., Niu, C. & Li, Rd. Prediction of Arsenic and Antimony Behaviour in MSWI Fly Ash During Co-Processing in a Cement Kiln. Waste Biomass Valor 9, 1475–1484 (2018). https://doi.org/10.1007/s12649-017-9832-1
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DOI: https://doi.org/10.1007/s12649-017-9832-1